White-tailed deer have specific nutritional requirements that can be met through habitat management and by maintaining deer numbers at the carrying capacity for the area. Under these described conditions, deer can get all of the required components of their diet, including energy, protein, fat, vitamins, and minerals, that allow them to function properly. Many deer managers will even provide supplemental forage in the form of protein pellets or food plots that allow for optimal deer performance and health.

But what happens when a deer’s diet does not meet their dietary requirements? The answer is simple: Deer suffer. This suffering comes in the form of lower body weights, poor body function, lowered immune systems, and sub-optimal antler growth. As far as deer are concerned, the latter is the least of their worries. Malnurished bucks will “steal” necessary vitamins and minerals from antler growth to supply critical processes. Does will do the same sort of thing, but malnourished does will abort their fetuses during pregnancy or abandon their fawns during nursing. In short, deer that have poor diets will do things you may not expect. Such is the case in these photos of a white-tailed doe eating a road-killed fawn. (more…)

White-tailed deer, like many wildlife species, prefer habitat that is at lower successional stages. Simply stated, deer like plant communities that are dominated by plants that are considered first responders after disturbance. Any disturbance helps set back plant succession, whether it be disking established areas, clear-cutting portions of forests, or natural or prescribed fire. And although hunters understand that deer management practices are designed to improve habitat, many habitat management practices are really only designed to mimic processes that occur naturally.

Of course, when it happens naturally land managers have very little control. Such was the case last year in Texas when the almost 15,000 acre Chaparral Wildlife Management Area (WMA) unexpectedly caught fire. It was March of 2008, but because of extremely dry spring conditions, a fire that started adjacent the area burned 95% of the state-owned WMA! Anyone that knows anything about the Chaparral WMA knows that the area is representative of South Texas brushland, but active habitat and deer management practices maintain a healthy deer herd that boast some big ole whitetail bucks.

Prescribed fire is an effective management tool for deer throughout the white-tailed deer’s range because most native brush species respond well by root-sprouting, regrowing, and providing high-protein browse. You see, most plant species are well-adapted to fire, but all deer managers that use fire as a management tool prefer prescribed or controlled burning. The fire that swept across the Chaparral WMA, on the other hand, was a wildfire. And although wildfires and prescribed fires ultimately have the same impact on native plants, prescribed fires are planned and allow burners the most preparation. Prescribed fires allow landowners the ability to pre-select the areas to be burned and the conditions under which they are burned. (more…)

Genetics (genes) are the most important factor in determining antler characteristics in whitetail bucks. However, genes are not the only factors that determines a buck’s antler potential. Both age and nutritioninfluence how a deer’s genes are expressed. For example, even a buck with the genetic composition to grow the largest rack in the world was harvested at a young age or was malnourished, then the genes that the buck carried were never fully observed. Because age and nutrition determine how a buck’s genes are expressed, these factors are critical to the success of a sound deer management program that strives to produce high-quality bucks.  

Although proper buck harvest is necessary to promote age and antler characteristics, nutrition can be achieved through a combination of habitat management and supplemental feeding. Habitat management is the single best way to provide year-round, high-quality food for deer, but this is typically only a viable option for land owners. Habitat management is not always feasible for hunters that lease land for deer hunting for a variety of reasons. In this case, hunters are limited to providing supplemental food through either food plots or free-choice protein pellets. (more…)

White-tailed deer are primarily browsers. They typically eat very little grass, with most studies estimating grass comprising no more than 7 to 9% of a deer’s diet in any season. Browse consumption is important to deer, but learning to read browse utilization can be important to your overall deer management program. Browse is defined as the leaves, twigs, and buds of woody plants. Browse is the bread and butter of a white-tailed deer’s diet on almost every landscape, but the importance of browse becomes particularly important during the winter months.

Why? Well, winter is the most nutritionally stressful time of the year for deer. Not only does a deer require massive amounts of energy to regulate its body temperature during the coldest part of the year, but food in many cases is not readily available. This is especially true at northern latitudes where extreme winter conditions prevail. In the southern part of the white-tailed deer’s range, winter temperatures are simply mild inconveniences. However, prolonged periods of cold weather at southern latitudes can take its toll on deer populations in this area simply because deer densities are higher. There may be more browse in southern forests, but there are also more deer! (more…)

Deer can sometimes grow hooves that are much longer than normal. Long hooves in deer is not common because I’ve seen reports from many different places over the years, but it’s not something most hunters will see in the field. Just this week I received an email that contained photos of a white-tailed doe than had long hooves (it was actually just her front left hoof and back right hoof). This condidtion is referred to as foundering and I believe the term comes from the word “floundering” because under extreme conditions the animal appears to be floundering around as it walks. From reviewing the literature, there appears to be three main reasons for long hoof growth in deer, but all are related to diet.

A deer that exhibits foundering is taking in way too many carbohydrates. Either this is a problem directly related to the forage that the animal is eating or it has to do with the way the deer is processing its food. More often than not, it has to do with what the deer is eating. A diet high in corn or protein pellets contributes to foundering. Corn, of course, is primarily carbohydrates. (more…)

Acorns. We know white-tailed deer like to eat them and that they serve as an important fall and winter food item for deer, but how good are they really? This question crossed my mind as I sat in my bow stand intently listening for deer walking quietly through the leaves, but all I heard over and over again was snap, thud, snap, thud, snap… acorns! Live oak acorns, the dominant oak in my neck of the woods, have been falling for a couple of weeks and they are still going strong. 

Acorns are rich in nutrients although quality varies between oak species. One thing I do know is that all acorns contain high amounts of fats, carbohydrates, and good amounts of protein, too. From what I have researched, one ounce of dried acorn has on average 140 calories, of which 9 grams is fat, 15 grams is carbohydrate, and 2 grams is protein. Using some simple math, that means a whopping 50% (72 calories) of the caloric intake is from fat! Now you now why deer pig out on them prior to the onset of winter. But the buck doesn’t stop there. (more…)

Each landowner or property manager must recognize the habitat needs of white-tailed deer on a continual basis and direct management towards meeting those needs. Since white-tailed deer have a relatively small home range of about ½ to 1 mile in radius over an annual basis, all of their needs for growth, reproduction, and cover must be met within this unit. Deer management is about food management–as in habitat.

Whitetail will seldom move from within their home range to meet their needs, even though better conditions may exists in the surrounding area! Deer are very versatile in their feeding habits and will eat a wide variety of items, including fruits, browse, forbs, agricultural crops, and even small amounts of grass. Deer “perform” best in habitat where a great variety of preferred food items are present. (more…)

Exotic deer were first imported into North America during the 1900’s and are now found throughout most of the white-tailed deer’s range in the United States. The number of exotics increased rapidly in the 1950’s. In Texas alone, the last exotic survey was performed in 1996 — and at that time there were an estimated 190,000 animals and 76 different species. Current estimates put the statewide number of exotic ungulates at 250,000!

Research has examined food habits of axis, sika, fallow, blackbuck antelope, and aoudad sheep — and data conclusively found that most exotics directly compete with white-tailed deer. Exotic deer, like whitetail, either preferred forbs or preferred browse, but could perform well on grass, as well. Regular readers of Buck Manager know that white-tailed deer prefer forbs when they are available, but as forbs become unavailable, they shift their diet to browse. (more…)