Q:  Is it ok to kill an insect that may be in danger or suffering?  I often see insects in my house with broken wings, or spiders with missing legs… Is it allowed/merciful in Islam to kill such animals?
Time: Thursday August 4, 2011 at 9:12 am

A: If you can assist the insect in gaining cure, or if you can nurse it, the reward would be greater. If you feel it must be killed due to its bothering you, you may be kill the insect.
Under general conditions, if it is not a bother to you, it would be better for you to place the insect outside. Allah (SWT has giving animals the abilty to fend for themselves.
Allah Certainly Knows Best.