Most dogs need to have their nails trimmed approximately once monthly. Dogs that are frequently walked on pavement or concrete may be able to go a bit longer.
Adult dogs should normally be fed twice a day. If you're concerned your dog is not eating at mealtimes, speak to your vet. Your dog should always have access to.
Most dogs can be neutered at around 6 months old, but it's important to discuss the timing with your vet because it should always be based on the following.