亂大小便幾乎是貓咪行為問題的基本款，佔行為門診的40~75%，如此廣泛以致不論公母，絕育與否，任何品種，年齡，都有可能發生。排泄行為的改變是需要與噴尿（標記行為）加以鑑別診斷的。貓咪在砂盆外便溺是一般主人可以觀察到的情況，此行為可能不具任何意義，而診斷分析前必須參考多項條件，包括排尿/排泄量，頻率/次數，及地點的改變，且不排除可能的生理病因。

 

下列為常見造成排泄行為改變的前置因子：

• 對砂盆反感（貓砂材質，或放置地點）

• 畏懼：負面經驗（疼痛，使用完砂盆被餵藥）

• 焦慮：分離焦慮，被其他貓盯著看

 

Elimination problems are the most common behavioral condition reported in cats accounting for between 40-75% of reported behavioral problems.

 

Both male and females, neutered and intact, present with elimination problems and they have been reported in all breeds and across all age groups. It needs to be differentiated from spraying or marking behavior. 

 

This involves urination and/or defecation outside the litter box. It may be normal. The elimination is of changed amount, frequency or location and may be associated with medical condition. It is a non-specific sign and not a diagnosis.

 

Several predisposing factors may contribute to the problem:

• litter tray aversion (substrate and/or location)

• Fear: aversive experience (pain, medication post to usage, etc)

• Anxiety: separation anxiety, presence of another cat