Exactly. We fought a long and hard battle for our Rotti/doberman mix some years ago. It was such a hard thing to watch. That is when I started using the heartworm faithfully. All year long as well as flea prevention because those little buggers are so hard to get rid of once they get in your home. Sheila
_____ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Mandy F. Sent: Wednesday, December 13, 2006 12:32 AM To: [email protected] Subject: Re: [Chihuahuas] Heart Worm Prevention We had to put down the dog I grew up with because she had heartworms. So terrible :( Ever since then, every dog we have gotten has been put on the prevention. To me, it's a blessing. -Amanda-

