Other rodents commonly used are guinea pigs, hamsters, and gerbils. Included are mice, rats, gerbils, hamsters, lemmings, and voles. The least weasel feeds predominantly on mouse-like rodents, including mice, hamsters, gerbils and others. Petco sells and holds fish, reptiles, small birds, hamsters, guinea pigs, and mice for adoption. Hamster shows are also places where people share their enthusiasm for hamsters among attendees. It usually does not attack adult hamsters and rats. Similar results have been found in studies involving different strains of rats, mice, and hamsters. Hamster shows feature an exhibition of the hamsters participating in the judging. The effect is seen in unicellular organisms, green plants, isopods, insects, birds, mice, and hamsters. They only become tumorigenic when infected into certain rodent species, such as Syrian hamsters. Pathogenesis occurs in the same manner in hamsters as in mice. His bedroom was filled with aquariums, terrariums, snakes, hamsters, spiders, and butterfly and beetle collections. There is no research on uncommon animals such as hamsters. Dwarf hamsters breed all through the year. This exclusivity has only been shown in golden hamsters and the rhesus monkey.