Hello. My calico is 7 and years ago she used to get tiny bald patches that would be around a quarter size and with no scab, heal within a week. Well lately she had a bigger one and I took her to the vet, I had extra money that week. He administered flea meds and stuff and it went away. Well it’s been exactly 1 month and it’s back in a different spot but looks different and has grown much bigger! I have a UV light coming in the mail tomorrow to check for ringworm and I will get a flea collar otw home from work. Opinions?? What product should I buy if it’s ringworm? The difference in these photos is like a week or 6 days!!! It’s gotten so big !