Today, we justify a lot of Laws and Commandments from the Bible based on the fact that we know now that it is healthy and or unhealthy. Modern refrigeration and hygienics make it all seem so appropriate for our day and age but when these Laws were given they were given for spiritual purposes, not because they're “green”, Biodegradable” or antioxidants.
There may be some truth today that mixing milk with meat is not healthy and may even cause cancer, who knows? The Hebrews were not into bio-fitness, organic, free-range poultry, vitamin-enriched foods - they ate or they were supposed to eat what G-d told them to eat. Even Manna from heaven was supposed to supply them with all the nourishment they needed and if they hoarded or stored it (which they were told NOT to do) was inedible the next day.
These Laws are Commandments for Jews not for everyone. The fact that people seem to trust Kosher hot dogs or other foods as maybe being more pure and clean is a benefit to those that consume it but due to the fact that it needs to be supervised by Rabbis, it can be costly.
Hebrew National kosher hot dogs - We answer to a higher authority.
In Old Testament times, either could have been a health hazard.
Swine also can present problems with handling and herding, and will eat human flesh, as well as act as a reservoir for viruses, most notably the flu.
There are many reasons the dietary laws made sense.
But, then, there's Bacon...