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Message: <blockquote data-quote="Nicolas C" data-source="post: 71407" data-attributes="member: 3795">Maybe the small size could be explained by the low temperatures. 16-18°C (= 60-64°F) is rather low, even for a hardy tarantula as a rosea. As tarantulas are poikilotherm (cold blooded), when temps are low, the metabolism slows down, which means: less eating, slow digestion, etc. The molts are less frequent (and more risky, as slowing down when molting isn't a ggod idea if the T wants to avoid being stuck) and the growth rate isn't very high. If you couple this with a specie which takes many years before maturing (slow grower), it's no wonder that your tarantula is still small. What puzzles me is the fact that you say it's eating on a regular basis. Normally, it shouldn't eat very often with low temps; if it eats regularly, it should grow. Maybe the preys are too small? Don't know...As Mass asked, a picture could help, if possible for you to take one.</blockquote>