There are three main ways I can think of that colors would change from what you see to what you get:
1 - light sources during the picture taking - this could be the flash, the particular lightbulb lighting your "studio" area (mine is a kitchen table most of the time)
2 - idiosyncracies in the display system - LCD monitor, CRT (normal computer monitor)
3 - film character (obviously only applicable when using a traditional film camera, not digital).
4 - (OK, i said three, but I thought of another

something in the structure of what you are photographing has "hidden" colors or is refracting/reflecting in such a way that a colored tinge (pink in this case) can become apparent.
for 1): most flashes are fairly balanced in terms of color - they should not introduce much color variation (see item 4 for an additional guess). Room light is potentially more of a culprit here, as is some other item nearby that the flash or room light coule be reflecting off. I had a blue bottle on the kitchen table once and it took me 1/2 hour to figure out where that blue tint on a white pen was coming from.
2): there's a longish post on this elsewhere in this topic - take a peek at it, if that doesn't answer all of the questions, ask some more

.
3): are u using a film camera or digital?
4): Some things with crystalline (or crystalline-like) structures can reflect/refract different components of the source color. Ever see a good diamond appear to be other colors when you know darned well it's clear? What you're seeing in that case is the sourece light being broken into component colors and reflected back. Same kind of thing happens with a rainbow. The best way to deal with this would probably be to avoid a flash, and make sure you have indirect lighting (an article called "John's Photo Booth" has a nice discussion on this off of the front page of Penturners.org). I think antlers have some kind of crystalline structure, so this is my current favorite hypothesis.
So let's end with questions:
- what kind of camera? Film? if digital, what brand/model? if film, what film being used?
- flash? kind of room light? (frosted bulb, 100 watt 2 feet away, clear bulb, flourescent, etc)
- any color filters on your camera? (they are usually little lightly colored glass or platic circles mounted on the lens - I bought a lens from a guy once that had one one on it and had the devils time figuring out why my pictures were all too dark with that lens - I almost threw it out!