Welcome to BYC. The one on the foot could possibly be bumblefoot if you can see a black dot on the bottom of the foot pad. The top usually would be soft and filled with pus. If it is firm or hard then I'd suspect a cyst or tumor. The lesion on the ear looks like a cyst of some sort, or an infected peck wound. Below are pictures of bumblefoot.
The top pic is bumblefoot as mentioned. Bottom pic may be a fungus. Try putting lotrimin or monostat 7 on the affected area until healed, avoid the eyes.