DENVER -- A Denver lawyer who specializes in product liability cases expects to see plenty of lawsuits in the wake of a massive pet food recall.

"It's my guess that anyone who has a pet that is injured will make a claim," said attorney Michael Sawaya. "And my guess is it will be paid."

The Canadian based Menu Foods has said 1 in 6 animals died during tests after the company recieved complaints of dogs and cats experiencing kidney failure. Menu Foods reported the first complaints came in February 20th. A massive recall involving more than 90 brands of pet food was ordered three weeks later.

Federal investigators continue to look into the exact cause of the contamination. The protein filler wheat gluten is one ingredient the government is focusing on as a possible source.

Sawaya says what investigators determine will impact potential legal cases. It's possible pet owners can sue for damages beyond vet bills and what they paid for the animal.

"It will depend upon whether or not there was a recklessness or willful disregard as to how much in damages they'll be able to get for sentimental values." Sawaya told 7NEWS.

Chris Brown of Centennial, Colorado says his cat has a 50/50 chance of survival after the vet diagnosed it with kidney disease. Brown isn't certain the cat's food prompted the problem, since it ate dry food. However, he says his veterinarian is suspicious it played a role.

"I just hope something comes up and we get this taken care of, so nobody loses anymore pets, " Brown said.

Brown's vet bill has already exceeded $500. He said his cat's health is worth it.