Here are clean and SEO-friendly subcategory ideas for each main menu page on your pet website:

Dogs

• Dog Breeds
• Puppy Care
• Dog Food & Nutrition
• Dog Training Tips
• Dog Health & Diseases
• Grooming for Dogs
• Dog Accessories
• Funny Dog Stories
• Senior Dog Care
• Adoption & Rescue

Cats

• Cat Breeds
• Kitten Care
• Cat Food & Nutrition
• Cat Behavior
• Cat Health
• Indoor Cat Care
• Cat Grooming
• Cat Toys & Accessories
• Senior Cat Care
• Cat Adoption

Birds

• Pet Bird Breeds
• Bird Feeding Guide
• Bird Cage Setup
• Bird Training
• Bird Health Care
• Talking Birds
• Exotic Birds
• Bird Grooming
• Bird Behavior
• Bird Accessories

Fishes

• Freshwater Fish
• Saltwater Fish
• Aquarium Setup
• Fish Food Guide
• Fish Diseases
• Aquarium Plants
• Fish Tank Cleaning
• Betta Fish Care
• Goldfish Care
• Fish Compatibility

Other Animals

• Rabbits
• Hamsters
• Guinea Pigs
• Turtles
• Reptiles
• Ferrets
• Hedgehogs
• Exotic Pets
• Small Pet Care
• Pet Adoption Tips

Animals Care Blogs

• Pet Care Tips
• Pet Nutrition
• Pet Health
• Grooming Guides
• Training & Behavior
• Pet Product Reviews
• Adoption Stories
• Seasonal Pet Care
• Emergency Pet Care
• Beginner Pet Owner Guides

Privacy Policy

Usually this page does not need subcategories, but you can add:

• Data Collection
• Cookies Policy
• Third-Party Services
• User Rights
• Contact Information

You can also improve your menu structure like this:

Dogs ▼
Cats ▼
Birds ▼
Fishes ▼
Other Animals ▼
Blogs ▼

Then show dropdown subcategories under each item.

A better professional naming would be:

• “Pet Care Blog” instead of “Animals Care Blogs”
• “Fish” instead of “Fishes” (optional, more natural English)

Example:

Dogs
Cats
Birds
Fish
Other Pets
Pet Care Blog