Cats should not eat blue cheese or any other type of cheese. While small amounts of cheese may not be harmful to cats, many cats are lactose intolerant and can experience digestive issues such as diarrhea or vomiting if they consume dairy products. Additionally, blue cheese contains mold, which can be toxic to cats if ingested. It's best to stick to a balanced diet specifically formulated for cats to ensure their nutritional needs are met. **

The Chartreux breed is often considered to be similar to Russian Blue cats. Both breeds share similar physical characteristics such as a short, dense coat, a muscular build, and striking green eyes. Additionally, both breeds are known for their gentle and affectionate nature, making them great companions for families. However, it's important to note that each cat is unique and may have individual personality traits that differ from breed standards. **

The Nebelung breed is often considered to be similar to Russian blue cats. Both breeds share similar physical characteristics such as a medium-sized body, long and dense fur, and a striking blue coat. Additionally, both breeds are known for their playful and affectionate personalities. However, it's important to note that while there are similarities between the two breeds, they are distinct and have their own unique traits. **

Yes, Russian Blue cats and European cats can be kept together. Both breeds are known for their gentle and friendly nature, making them generally compatible with other cats. However, it is important to introduce them to each other gradually and provide enough space and resources for both cats to avoid any potential conflicts. Additionally, it's important to monitor their interactions and provide plenty of socialization and playtime to ensure they get along well. **

No, fancy rats have not eaten other fancy rats. Fancy rats are domesticated pet rats that are typically well-fed and cared for by their owners. It is not in their nature to eat other rats, and they are usually kept as companions and pets rather than for predatory purposes. **

Fancy rats are generally considered to be more intelligent than fancy mice. Rats have larger brains relative to their body size compared to mice, and they are known for their problem-solving abilities and social intelligence. Rats are also more trainable and can learn complex tasks, making them popular as pets for training and interactive play. While mice are also intelligent animals, rats are often considered to be more advanced in terms of cognitive abilities. **

Cats are born with blue eyes, but their eye color typically changes as they grow older. Most cats' eyes will change from blue to their permanent adult color by the time they are around 3 months old. The new eye color can range from green, gold, or yellow to shades of brown. However, some cats, particularly those with certain coat colors or patterns, may retain their blue eyes into adulthood. **

Russian Blue cats are known to get along well with other cat breeds that have similar temperaments, such as the British Shorthair or the Chartreux. These breeds are also known for their calm and gentle nature, making them compatible companions for Russian Blues. Additionally, breeds like the Ragdoll or the Maine Coon, which are known for their friendly and sociable personalities, can also make good matches for Russian Blue cats. Ultimately, the best match for a Russian Blue cat will depend on the individual personalities of the cats involved. **