Please choose the correct ending to complete the given sentence: Youth: [header] How to diagnose and treat giardia in cats [title] Watch for changes in bowel movements. [step] If you want to diagnose giardia, pay attention to your cat's litter box. The main sign of giardia is unusual bowel movements.

Ending1: Ask your vet about how your cat might be acting. [substeps] Also, make sure your cat avoids fluids entirely, like water. Ending2: If you notice unusual or unusually movements in your cat, then you will need to visit the vet. [substeps] Some cats may have a bowel bulge up to about two-inch (7.6-centimeter) long. Ending3: Cats will have foul-smelling, watery diarrhea that may contain trace amounts of blood. [substeps] Some cats may also lose weight with giardia due to the diarrhea. Ending4: At first, mild stool will show up on the litter box. Then, if there is mild, moderate or severe diarrhea, a vet may notice leg or bowel problems.

Answer format: ending1/ending2/ending3/ending4