The ones I’ve seen are Heartgard, Iverhart, and Interceptor. Does it really matter which one I use? Are they all equally effective?

Also, will my dog need to go to the vet before I start her on heartworm medicine? I would rather order from 1-800-PetMeds than the vet, but I wasn’t sure if they’ll need to test her for heartworms before I start giving it to her.

I have seen advertisements online to purchase Advantage flea treatment (which is designed for extra large dogs) kits to divide for cat treatment. They say that advantage dog and cat medicine is the same. Is this true?

In using one bottle of advantage (for dogs) to make individual doses for cats, how does the medicine work?
For example… I usually get the "large" breed red pack, and dose it out.. but that cuts it really close. If I were to get the "extra large" breed bottle… is there just more product per tube? Or is the medicine actually stronger?
Thanks.

I have 3 advantage flea control doses left. They are labeled for "Cats and kittens 8 weeks and older and over 9 pounds". One of my cats is rather large and over 9 pounds, while my other cat is much smaller (maybe 4/5 pounds). Can I give the smaller cat just half the tube of advantage?

For a bigger cat, do the just give you more medicine or is that the medicine is stronger?

I want the Advantage brand. I just found out my cat has fleas by using a very simple online method and yeah, this sucks. its totally fu*king gross, im about to vomit.

see now i have to get my dad to buy my cat some advantage because im only 15, i cant just buy this on my own. i dont know how to approach him because JUST TODAY we took our cat to the vet and spent about 317 dollars for some cat medicine (my cat was sick and hurt his paw)

so yeah, please tell me

1) how much does this medicine cost
^ you know, anyone who might have bought it.

2) So how can i approach him, he already spent alot of money on this "claravax" cat medicine and … i’m not sure how to tell him im chiecking my cat for fleas when my cat is wounded and is basically on bed-rest on MY bed….

3) there isnt a possibility that i can get any kind of nastyness on me, right? like a teenage girl getting some sort of ‘fleas’ on her…??
ahh, im scared.

THANK YOU :]

please help ::(
The vet said my cat is about 14.5 pounds.

thats what the vet wrote on the paper.