Please help! I only gave him his treatment last week and I've found 5 ticks attached to him (others I've found crawling in his fur). The one I just pulled out from his chin was huge. I've been giving him a Credelio tablet once a month since he was 3 months old, he's now 8 months old so the treatment should've had enough time to get in his system.
Does anyone have any suggestions as to what else I can do? This is my first cat since I was a young child so I've never had this problem before!
Thank you!