Mink are savage creatures, and now this one knew of the muskrats' presence. It had made no effort to investigate closely, either because it had just fed and wasn't hungry or because it had other game in mind. But it might have marked the muskrats as a possible future dinner and mink were almost the only predator able to follow a muskrat into its den.
Though they preferred peace, muskrats could fight savagely and they had the courage to fight. If there were easier game available, a mink might very well choose it rather than risk a battle. But a hunger-driven mink would never reckon the odds and unless it was very lucky, no muskrat could defeat or escape from one.
This presented a serious problem. Furs provided an important part of Andy's income. If he trapped the mink now, instead of waiting for cold weather to bring prime furs, he'd get nothing for it. But if the mink started killing his muskrats, he'd have to trap it. Mink were one of the many things he'd have to watch closely.
Late in the afternoon, Andy started back into the swamp to see how his charges were doing.
The pair he'd left in Dead Man's Slough were busy making themselves a house. When Andy approached, they swam cautiously to a clump of reeds and lurked near them. Studying him with watchful eyes, they swam in little circles. When he made a sudden move, they dived. Satisfied, Andy went on. These two were at least beginning to suspect that all callers wouldn't necessarily be friendly.
The second pair, the naturally cautious ones, were not in sight when Andy approached the slough where he'd left them. But dimly beneath the water he saw the entrance to a den. No doubt the muskrats were in it.
Andy came to the third slough just in time to see a clean-limbed gray fox, a muskrat dangling limply from his jaws, trotting away from it. Andy muttered under his breath. He hadn't brought a gun because, though he'd known that predators might be raiding his muskrats, he hadn't expected to catch any in the act. But from now on he must always be armed and definitely he would have to eliminate this particular fox. Having learned that it could catch muskrats, it might hunt them constantly and conceivably could catch all twelve.