I was asked to take a look at this thread. Don't know how I missed it either.
Let me start off by saying I'm sorry for your violation Dez, and that's what it is. Somebody violated your home and property. I happen to be a forensic Specialist and work scenes every day ranging from something as mundane as a car burglary to homicides. I'm also a court qualified latent print examiner. I don't share that a lot since I come across plenty of shady people on the internet.
I read all the posts, let my clarify a few things as I can.
To start with every police department handles property cases differently. This can be based on their resources among other things. Out here in California we have other issues, like laws that catch and release burglars, which result in resources getting put towards other types of crimes. Now with that said, I still spend a huge amount of time looking for latent prints, collecting shoeprints (that can be a 45 min job for just one shoeprint), DNA and other forms of evidence. All that is geared towards being able to PUT the suspect at the scene and maybe contradict the standard response of "I just found the stuff, I didn't steal it". Matter of fact out here if you get caught with stolen property now after our last election, it's a misdemeanor. Very frustrating from the viewpoint of the guy spending a lot of time at the scene trying to help out victims when I know that very little is going to happen to the suspect. My main hope nowadays is to just help get the property back.
As for print work, I can say I have had to explain to many a jury the misconceptions around DNA and print recovery. It's nothing like TV nor just an easy thing. For example you have over 6 different factors that all have to come together just right to result in a usable identifiable finger print. Just because we touch something does not automatically mean we leave a good print. There are certain types of calls where forensics won't be used due to statistics showing evidence is rarely recovered and resources are limited, so choices are made.
Would I have printed those cages? I would have. Would I expect any useful prints on 30 cages? No. How much time would I be tied up on going through all the smudges and partial prints when I get back to my desk...don't be shocked when I say I could be tied up at my desk for a solid 15 hours (spread over a few days) with a magnifier. During that time other cases come in and I would not be able to get to them ..a backlog occurs..then other cases get put off longer. It's all about resources.
I don't even know if you have a department that HAS a forensic unit. hell, the small cities around my city contract with us to process their crime scenes up to a point. There are many small cities out there that don't have a forensic unit and they use the county crime lab. The county crime labs almost always ONLY come out for crimes against persons, not property crimes. Despite how much we care about our pets, they are still property.
All that info doesn't explain why your detective did or did not collect evidence if any. I'm just giving some insight. You'd have to find out if your department has a unit, if they respond to property crimes, or if there is a list of criteria for them to come out to a non violent crime. If it turns out they do have a unit, and the unit would respond to a property crime, I'd have a talk with the department as to why they dropped the ball and didn't look for evidence. The squeaky wheel gets the grease.
Based on what I've read only, I'd say some people familiar with your property and the neighborhood decided to make some fast $$$ and hit your house. It doesn't seem like "kids being kids" type of stuff. The meaning of that is the rest of your chams most likely have been sold and are out there somewhere. If it was just kids then going door to door might help them show up.
You are still missing a substantial amount of property, you have to put it that way to your detective, and then push for more results it sounds like to me. If they got a lead finding some of your animals then they can push that bastard for more info on the others. They don't buy him just finding the animals I'd be willing to bet but you need to keep the fire lit.
The idea about going to the news is a solid one but the timing may be past.
Always set up video cameras, those help us solve more crimes than I can count.
I hope you find the rest in better condition than the ones you got back. Consider civil options against the guy who had them, you'd be surprised how much you can do to a thief using that. It doesn't take a unanimous decision by a jury to reach a conclusion in civil court. Hammer the bastard for the $6000.
I hope that helps a little.