Crickets can and will go after your spiders, scorpions, centipedes etc after they have molted because they are so soft and vulnerable. I know this from first hand experience and if you visit arachnoboards.com you can see pictures of the carnage a single cricket can do. Crickets can be downright nasty so you don't want to leave them in the tank if you even suspect a molt is coming.
Sounds to me like you have a rose hair, am I correct? If so I wouldn't worry at all. Even if you don't, old tarantulas can go premolt and refuse food up to 5months before molting. They won't even think about feeding after that until they have hardened again and that can be weeks. Just make sure it has water, it at the right temps has the appropriate humidity and leave it alone. Also, it needs a place to hide if it is an arboreal, (corckbark tubes work great) or at least 6"-12" of substrate to dig its own retreat in if its a terrestrial. Otherwise it is going to stress out. A happy tarantula is one that has a snug, tight fitting retreat.
Best advice, and this comes from me keeping over 400 tarantulas and breeding 3 species for the past 6 years, make sure their home is right and leave them alone. Most of the time they are a pet hole. Thats what makes them happy.
Sounds to me like you have a rose hair, am I correct? If so I wouldn't worry at all. Even if you don't, old tarantulas can go premolt and refuse food up to 5months before molting. They won't even think about feeding after that until they have hardened again and that can be weeks. Just make sure it has water, it at the right temps has the appropriate humidity and leave it alone. Also, it needs a place to hide if it is an arboreal, (corckbark tubes work great) or at least 6"-12" of substrate to dig its own retreat in if its a terrestrial. Otherwise it is going to stress out. A happy tarantula is one that has a snug, tight fitting retreat.
Best advice, and this comes from me keeping over 400 tarantulas and breeding 3 species for the past 6 years, make sure their home is right and leave them alone. Most of the time they are a pet hole. Thats what makes them happy.