Sentences with phrase «cats over several generations»
He conducted his research with two groups of cats over several generations, feeding one group exclusively raw foods, and the other group exclusively cooked foods.
http://alliswellpets.com/ Not exact matches
Unlike dogs and cats who have been selectively bred and domesticated over several millennia, parrots have only been bred domestically for a few generations and therefore they are not that different (physically or psychologically) from their wild counterparts.
Several of the largest pet food producers, such as Hills, Walthams and Purina, maintain their own colonies of dogs and cats, and test their foods on hundreds of animals over years or even multiple generations.