Hello,
Sorry to hear about your beardie! I prefer for him to stay away from other animals(You can have animals and beardies become best friends but it takes time like my Hazel and how she became best buds with my dog Skye) I agree, Crickets go for wounds so not the best feeding source. Beardies need live insects to keep them healthy, They also need a lot of greens as that is how they mostly get their water if not
drinking out of a bowl. I've seen so many beardies get hurt because people will try something out and it does not end well. Sometimes it can end up just fine but please make sure he has those greens and insects! also, good tank setup as well. So many good things about your beardie, just make sure you have the right setup and diet! Hope he does well, Also send pictures of you setup!