>>518880192
>>518880373
>>518880486
>>518880602
It's a flea collar.

>We don't know how the cat had been before it was adopted. They needed to solve the flea problem immediately, and it's difficult to do in a dugout in the forest among the war action.
> Even if the cat was okay, it's a risk to get flea in the forest.
> It's a risk for soldiers to get fleas from the cat in the dugout. Think about possible diseases, let alone feeling of discomfort and other issues, especially during the fight.

A flea collar, perhaps, temporarily, looks like a reasonable solution.