no we had over ten hermit crabs in one cage and they were all fine.:) since they are both different sizes you should keep an eye on them but you shouldn't worry because hermit crabs are very social animals.
hermit crabs are very pickey about there new domane or house put more than one shell in the cage.:)
No hermit crabs inspect a new shell inside of their cage the they pull them self out of the shell and then drop them self into a new shell. there are videos on youtube.com of crabs changing shells. so provide your crab with extra shells. i am a hermit crab owner i have watched my crabs change shells it is called molting.
By washing your hands thoroughly with germicides.
No, Hermit Crabs molt due to bodily changes. After molting they find new shells to fit their new body.
No, they find new ones.
Don't do that! Hermit crabs may get out of their shell to change into a new shell or even get out to eat some lettuce or drink water from a water absorbed sponge. During that process who knows what the hamsters would do to the hermit crab. They're not meant to be in the same cage!
then the crab goes and finds a new shell
Hermit crabs are considered to be in the arthropods family. Hermit crabs have a hard exoskeleton made of chiton which helps provide protection and give the muscles attachment support. Although a hermit crab will grow, their exoskeleton does not so they must constantly shed said exoskeleton in favor for a new one that it grows into.
Hermit crabs will normally get along with other hermits of equal size.
Mites. If you get them don't worry just bathe your hermit crabs a few times, dump out all their substrate and get new substrate and wah all their toys and dishes. These mites cannot harm the crabs.
No they grow out of their shells and find a new one.