Last week Daisy snagged her tail on one of our cactus plants in the backyard. The needle was about three inches long, with about 1/2 inch imbedded into her tough skin. I had to use the pliers from the tool box to pull the sucker out, but it ended up breaking off twice. I am certain there's still a needle tip buried in her tail but she's refusing to let anyone near it. She stayed away from everyone for about three days even though she didn't have a fever and there was no noticeable swelling. She seems to be doing much better now - although I have no idea if the needle is still there or not - she's back to her usual antics therefore I'm not too concerned.