Step one, get a monkey, make sure that is not infected to avoid "surprises" while carrying your furry buddy
Step two, handcuff him so the bastard doesn't tries to escape while you are pulling him
And finally step three, carry him around in combat
Optional: you can put him some armor to increase "survivality"
Now you have a monkey pet that protects you against: bullets, Friendly Fire, xenos, angry marines, angry russians (Iron bears), angry MPs, facehuggers, etc.
Have fun

