How much does the job pay? tamsulosin 0 4 mg basics Leaving food out for foxes will encourage the rat population to increase. Both are disease carriers. Fox faeces left in parks and people’s gardens can cause eye problems and blindness, especially if children come into contact with them. Foxes are wild creatures, not semi-domesticated animals which can be wormed or deloused on a regular basis. Would he or others feel the same way if 20,000 wild urban dogs were allowed to roam the streets of London unhindered?