My new mare, Lucy, has these odd looking bulges in the cornet area of all four of her feet. I just noticed it a few days ago. She was trimmed by my farrier on Wednesday 13 March, and nothing was noted. My farrier said her feet looked great. I am slighty concerned about founder, but I've made sure to take all precautions against it since I got her two weeks ago. She arrived in pitiful condition, very emaciated.
Here are some pictures.