Animals under the law are property, but they are a special kind of property. The law doesn't really explicitly recognize that, but it does implicitly recognize that. Quebec's move to classify animals as sentient beings was an explicit move toward that.
For example, it's a criminal offence to abuse an animal. It's not a criminal offence to abuse a table. That's because we implicitly understand in the law that animals are sentient individuals. When it comes to their ability to suffer, animals are no different from us humans, and in fact, we sometimes forget that humans are also animals.
Generally, the world over, there is a trend toward recognizing that animals are a special type of property, that we use them as property, but that we're also increasingly in science recognizing that they are sentient. Also as a society we're becoming much more empathetic and compassionate toward animals as vulnerable individuals in our society.
I think that global trend paints the background a little bit for why it is so important to move these regulations. There is discussion of the difficulties, and there are discussions of whether this is really going to change things, but of course, that's what we're here for. We have to believe that regulating works and is essential to a functioning democracy.
As to the case in which Anita Krajnc has been charged with criminal mischief in Toronto for giving pigs water, I think that case really illuminates the problem with pigs in particular aboard these hot, metal trucks that are not climate controlled. In the winter they can become very cold, frozen even. Ms. Krajnc has documented pigs with frostbitten ears. Conversely, in the summer they can arrive panting, which the code of practice for transportation of animals says is a sign of heat distress in animals and needs to be addressed immediately or the animals risk dying.
We didn't get into too much detail, but in New Zealand, for example, pigs and other monogastrics can't go without water for more than six hours, so they parse out water and food in a species-specific way to recognize that pigs don't have sweat glands, and on board metal trucks they are dropping dead. About 15,000 animals a year are dying in transport.