Some animals, like dogs, prefer sweet foods, and research suggests that this is because they have a higher number of sweet taste receptors than other carnivorous animals like cats. Conversely, cats are obligate carnivores and have fewer sweet taste receptors, suggesting that they do not need to detect sweet flavours in their diet. Other animals, such as dolphins and sea lions, also have a low preference for sweet foods, possibly because they feed primarily on fish and other seafood that do not contain high sugar levels.

However, it’s important to note that while animals may have different preferences for sweet foods, this does not mean that they are not capable of detecting sweet flavours or that they cannot consume sweet foods at all. Some research suggests that even some obligate carnivores may have some sweet receptors and consume sweet foods in small quantities.

Source: mentalfloss.com