Report Abuse. You should get them at 8 weeks old. That's an age where it won't be dramatic for them to be without their mother (or at least a caregiver that can take care of them 24/7) and old enough where you can start training. A lot of rescue center won't even give dogs younger than that.Silvia Â· 5 years ago. Thumbs up.eport Abuse. You should get them at 8 weeks old. That's an age where it won't be dramatic for them to be without their mother (or at least a caregiver that can take care of them 24/7) and old enough where you can start training. A lot of rescue center won't even give dogs younger than that. Silvia Â· 5 years ago.
Updated August 04, 2014. You can use a black light to detect body fluids. It's actually a good way to look for pet urine or make sure a bathroom or hotel room is really clean. Cat urine, in particular, glows very brightly under ultraviolet light. Urine glows under a black light primarily because it contains the element phosphorus.
Although the source of cat urine is often hard to find, you can pinpoint it fairly easily using a simple UV light. As funny as it sounds, cat urine glows under UV, or black light, which is a type of light that we can't visibly see (like infrared radiation, or microwave radiation).Turns out, tanning beds aren't the only thing artificial UV light is good for!s funny as it sounds, cat urine glows under UV, or black light, which is a type of light that we can't visibly see (like infrared radiation, or microwave radiation).