As if you didn't think you had enough bugs to worry about with fleas and ticks [1], there's still mosquitoes, too. Not only are they super annoying, but bites from these bugs can lead to heartworm in dogs and cats – your pets should be on a year-round heartworm preventative no matter where you live. While symptoms can be hard to detect, they include sudden respiratory problems like difficulty breathing and a persistent cough that requires immediate attention. What about flies? Find out when you .

Now, flies are less likely to spread disease to your pets, but they will (on rare occasion) lay eggs on a cut or poop-stained fur . . . umm, yuck. This can then lead to an under-the-skin maggot infestation that could even become fatal. If you smell a strong, foul odor coming from a wound or spot patches of skin rubbed raw, head to the vet pronto!

Source [2]