How long does it take for a flea collar to work?
How long does it take for a flea collar to work? General Dog Discussions
I just got a dog for the first time. Right when we got home, he started itching a lot, so the next day I bought a flea collar. When I put it on him, it didn't do anything. He just kept scratching. The instructions in the box said that the collar would work right away, but there's no signs of it working. He keeps whining and scratching!! Is it working??I can see the ticks and fleas on him, but when I try to brush them off, they crawl back inside his skin..