One out of my three cats has fleas. The other two do not exhibit any signs of having fleas. Do I have to treat all three for fleas?
yes ,even though they do not show any signs they might still have fleas.If you only treat the ones showing symptoms the other might make the fleas flare up again and you will have to do it all over again.
If one has them, all will get them. I would treat all 3
Yes, you do! and check carpeted areas in your home. These are nasty critters & are hide & multiply!!! Get going asap!
Of course you do!! And take them ALL TO THE VET! There is nothing worse than an irresponsible pet owner!!!! Why do people think, their cats don't need to see the Vet?????