On the subject of penned deer, I have access to a small group of sika, one of which has a rather oddly shaped head. This looks like more than just a lump - the whole head on the right hand side seems slightly swollen. This was first noted some three months ago, when it was put down to being possibly a dental abcess or something similar. The hind in question seems happy enough, is feeding well and is remaining with the rest of the herd as they move about the paddock, often in fact leading them. Could the swelling be down to some sort of benign tumour?