Well I am not very sure about the food but the ticks and lyme disease…It is good you plan to take her to the vet soon. I found a tick on my basenji and I was so worried because she hadn't been on any flea and tick prevention. (I had never seen a tick on or near her before...I've had her for about 2yrs.) I felt so much better at the vet because their was nothing wrong. Just take her to the vet asap.