Why did God create diseases that only animals get?

Some ailments are the result of pollution and toxins getting into the foods they eat in the wild.

No gods exist.  Hope that helps.

Quoto the Invisible user!

God did not create any diseases all sickness and disease are a result the curse brought on by Adam's disobiendence to God.

Genesis 3:14-19.

14 The Lord God said to the serpent,“Because you have done this,    cursed are you above all livestock    and above all beasts of the field;on your belly you shall go,    and dust you shall eat    all the days of your life.15I will put enmity between you and the woman,    and between your offspring[a] and her offspring;he shall bruise your head,    and you shall bruise his heel.”16 To the woman he said,“I will surely multiply your pain in childbearing;    in pain you shall bring forth children.Your desire shall be contrary to your husband,    but he shall rule over you.”

17 And to Adam he said,“Because you have listened to the voice of your wife    and have eaten of the treeof which I commanded you,    ‘You shall not eat of it,’cursed is the ground because of you;    in pain you shall eat of it all the days of your life;18thorns and thistles it shall bring forth for you;    and you shall eat the plants of the field.19By the sweat of your face    you shall eat bread,till you return to the ground,    for out of it you were taken;for you are dust,    and to dust you shall return.”

God did not create any diseases all sickness and disease are a result of the curse brought on by Adam's disobedience to God.

What does god have to do with viruses morphing