Shady business. AVOID THEM. They do not stand behind their products. They not only sent me the wrong item I ordered, but they wouldn't refund my $$$. They will not return my calls or my emails. There is a reason they were the cheapest. It's not worth putting your pets health on the line. There products are not FDA approved either:
http://www.fda.gov/forconsumers/consumerupdates/ucm*******.htm
Just stay away, they are not animal lovers and are only out to make money. Plus, they do not guarantee their products.