dashiichi: It's only 1:1 carbon to creature pellet in the nutrient processor in the current (pre-Companion) release, so keeping a stack to feed predators is cheap and easy. I'd rather toss out a pellet than shoot them and one pellet can keep several occupied for a while.
In my 200 years of playing No Man's Sky I never tried putting carbon in the Nutrient Processor as I could make these in the Craft Product window. Just tried with the new update and the ratio is 1:1 in the Nutrient Processor and 60:1 from Craft Production (both ratios are Carbon to Creature Pellet).
There is a new experimental out but the timing definitely looks like it was released after end of the business day in Poland so it will be at least a day delay for GOG users. I pirated the notes from Steam:
Experimental Branch 17/02
•Fixed a glitch in the sleeping animation for blob-like creatures.
•A number of creature behaviours have been rebalanced to better match personality traits.
•Fixed a bug that could allow companions to attempt to locate a building while not on a planet.
•Fixed an issue that caused missing controller icons to appear when riding a pet using Vive controllers.
•Fixed a number of issues with the way companions aimed their mining lasers.
•Fixed an issue that could very occasionally cause creatures to use speech options from an incorrect personality type.
•Introduced a number of tutorial hints for the first time players who use the Egg Sequencer.
•Fixed an issue that could cause companion summoning icons to render incorrectly.
•Fixed an issue that caused inconsistent colour formatting in companion speech.
•Fixed a number of issues with companion particle effects.
•Fixed a number of issues related to network syncing creature interactions.
•Fixed a number of issues that caused players to appear in the wrong position when riding creatures.
•Fixed an issue that could prevent a small number of creatures from being customised.
•Improved the positioning of accessories on some four-legged creatures.
•Aggressive companions will now attack hazardous plants.
•Fixed an issue that caused some companions to only mine objects that were very close to them.
•Fixed a number of creature animation glitches that could occur in multiplayer.
•Fixed a crash that could occur when reading the text at a distress beacon.
EDIT: A second 3xperimental came out today but not for GOG.