If it comes down to trying to escape from airborne FLIR platforms that are circling your immediate area looking for you, you are probably screwed. The anti-IR poncho might be the best bet, since you could carry it and not hinder your mobility, then you could dive into thick cover and put it over yourself. But ifthey are already tracking your heat sig, forget it, game over. They will direct K-9s to your hiding place quickly. Or, if the ROE have changed, just shoot you from the helo with a burst of MG fire.
I suggest training with the use of a FLIR, you can buy one from Cabelas. Have a friend use the device while you work either in or awat from your objective. Many people are not aware that you can take rusted brillo pads and aluminized powder from an etch a sketch and with an igniter like a fireworks sparkler or a strip of magnesium you have thermite.
With some trips to Walmart or Radio Shack I can take a $20 remote control toy and make a poor mans RC transmitter, I have done it at a gravel plant where I sit in a loader and with the guts taken from a Radio Shack car I made a transmitter with a four function swith to operate a conveyor belt and chute controls.
If I knew I was spotted by a FLIR I would set off a dozen thermite charges to overload the FLIR screen. But it depends on what the objective was, was it recon or was it a target of action, in and then out hot?
Depends but as far as dogs go I have not a lot of fear in that area. A MG from a helo, well that can ruin the day if you stay still too long in one place, but a smart person could buy several dozen green laser pointers, wrap them all together in a short tube with a common switch and with several dozen beams striking a person looking through a scope it may be enough to make them break off.