Dogs can start acting like cats because they are highly impressionable. If the pooch has spent more time around felines than their own species, there’s a high chance that they’ll start imitating the behavior of the cats. 

Since they’re easily influenced (this makes them easily trained, too!), they start copying their actions because they think that’s what they should be doing. Some may start using the litter box, try to squeeze into boxes, or repeat any other mannerism of tabbies. 

In fact, certain dog breeds have natural cat-like characteristics due to their genetics. Let’s take Basenji, for instance. They are often called the cats of the dog world and are independent, intelligent and even groom themselves like the felines. 

Italian Greyhounds are sensitive and like to sunbathe like cats, while Whippet enjoys lying around and chasing prey.

Some dogs are just naturally independent. Greyhounds, Basset Hounds, Maltese, and poodles can exhibit such traits. The individualistic behavior is often ascribed to cats, but it isn't uncommon to see in dogs too. Some pooches, just like us, prefer more company, while others less of it.

Health and nutrition might also have a play in this. If the dog receives a high-protein diet, similar to cats’, they might start pouncing on toys or scaling the sofa as well. The proteins that are in the food might heighten their energy levels, leading them to cat-like behavior.

However, sometimes it’s not just the individual dog’s traits that have them acting like a feline. Health issues might also be involved. For instance, some dogs may try escaping pain and discomfort by seeking high places due to arthritis or other conditions. Hiding away while sick is a very cat-like characteristic. 

Meanwhile, active self-grooming can be an indication of skin diseases or mites. Cats do so to keep themselves clean, whereas dogs typically have a precise reason for it. Certain skin conditions may cause discomfort, which can be relieved by licking. They may also resort to grooming themselves when they’re anxious or bored. This is their way of finding something to do or cope with the nervous feelings. 

Therefore, if the owner notices a sudden change in their behavior or they’re playing cat too convincingly, it might be beneficial to have a visit or a chat with a vet. If they’re habits that the pooch exhibits frequently, there’s probably nothing to worry about—they're just imitating their feline friends or like some time to themselves.

Even though we see that cats and dogs can very much enjoy each other’s company and aren’t really the natural arch nemeses, it’s still important to supervise their play. To keep each pet safe, it’s important not to force them to interact and to ensure that they’re socialized as early as possible. The secret to building a long-term friendship is not to rush anything and let them get familiar at their own pace!