Final answer:
Feline patients with type A blood have A antigens and anti-B antibodies. They can receive blood from type A or type O donors, but not from type B or type AB donors.
Step-by-step explanation:
Feline patients with type A blood have A antigens on the surface of their red blood cells and anti-B antibodies in their plasma. This means that their blood will agglutinate (clump together) when exposed to anti-B antibodies. These patients can receive blood transfusions from type A or type O donors, as these blood types do not have anti-A antibodies that would react with their red blood cells. However, they cannot receive blood transfusions from type B or type AB donors, as their anti-B antibodies would attack and destroy the red blood cells of these blood types.